CN2127218Y - Substation type expanding automatic telecphone switching machine - Google Patents

Abstract

The utility model relates to a vehicle speed automatic control device used for freeways. When the vehicles enters into a section of a highway with speed restriction, the signals of the set speed limiting values projecting by a road-surface radio transmitting device are received by a vehicle signal receiver, and then are displayed in different electrical levels and digitals in a photosensitive speed-counting and speed-controlling sensor. Compared the electrical level with the actual speed of the vehicle, the output electrical signals are took as the dynamic force under the function of a photosensitive device in the photosensitive speed-counting and speed-controlling sensor. A driving vehicle follow-up oil supplying mechanism controls the quantity of the oil supply of vehicle, and limits the vehicle driving in a certain range of speed. The happening of traffic accidents can be prevented and reduced. The device can also implement the automatic enactment and the automatic control of the vehicle speed.

Description

Substation type expanding automatic telecphone switching machine

The utility model is a kind of automatic telephone switch additional on the local telephone switching system subscribers feeder, is connected across to connect four telephone sets on the subscriber's telephone line, realizes exchange automatically.

At present, program controlled user Private Branch Exchange PBX (is example with Shanghai 50 HAS-50 of factory series) is made up of subscriber line circuit, cord circuit, control circuit, simulation switching matrix, is provided with 2 outside lines, and 8 cord circuits, capacity are the 8-144 door.The External Call mode has three tunnel: the first kind of direct dialing to call out, i.e. other extension set is replied or transferred to No. 1 extension set of outside line direct calling by it; The second, plant the direct dialing recursive call, i.e. extension set is put through in outside line No. 1, after 20 seconds if no response No. 2, recursive call or No. 3 extension sets in order automatically; The third transmits calling, i.e. after certain number extension set was connected in outside line, other arbitrary extension set transferred to outside line again by this extension set.This exchange line directly incoming call is specified extension set, needs artificially switching, and the speed that continues is slow, and interference is arranged mutually.

The purpose of this utility model provides a kind of automatic telephone switch, and the outside line user can directly put through arbitrary appointment extension set.

The purpose of this utility model is achieved in that through electronic circuit control, by C ₁₆, R ₃₂, D _{14-17, c17}, C ₁₈, W ₂The current rectifying and wave filtering circuit of forming is connected across on a, the b line, waits for receiving the ringing signal that outside line is sent here; Relay J behind the receipts bell ₅Two pairs of changeover contacts are with R ₃₃With collection of letters transformer B ₁Coil L ₁Jump on a, the b line, provide DC channel, and prepare to receive outside line subscriber dialing pulse to local exchange; After receiving outside line subscriber dialing pulse, one one in the four part machines through relay J ₁Or J ₄Two pairs of changeover contacts be connected across on a, the b line relay J simultaneously ₆Two pairs of changeover contacts with 25Hz transformer B ₂Ringing signal to the branch power ringing that is connected across on a, the b line.Four part machines all can receive the outside line customer call separately and call out the outside line user.

Operation principle: do when called, a line is through C ₁₆, R ₃₂, D _14-17, C ₁₇, the b line forms ac circuit, waits due-in bell.The outside line user puts through the back and sends ringing signal by switch here through a, b line, high potential 1 occurs at the F point, and electronegative potential 0 appears in door 24, through R ₁₅, C ₆23 outputs 1 of time-delay door trigger Q ₅Trigger, Q ₅Output 1, J ₅Adhesive, J _{5-1, J5-2}The normal opened contact closure makes a line through J _5-1, R ₃₃, collection of letters transformer B ₁L ₁, J _5-2, the b line forms DC loop (being equivalent to user's off-hook), wait for receiving outside line subscriber dialing pulse.The outside line user dials (is example with No. 1 extension set) after the extension, the pulse signal of dialling deliver to a, b line through switch, at collection of letters transformer B ₁L ₃Export corresponding dial impulse, through C ₂₂Coupling, R ₃₉, R ₄₀, C ₂₃, C ₂₄The integration shaping, 1/4LM324 compares, door ₂₈Amplify door ₂₉, the door ₃₀, C ₂₇, R ₅₁, the door ₃₃, C ₂₈, R ₅₂, the door ₃₄Two stages of differentiation is by door ₃₅At the square-wave pulse of B point output with the dial impulse variation; Simultaneously through door ₃₁, D ₁₈, C ₂₆, R ₄₉, the door ₃₂Time-delay is in A point output 1, and control counter is exported.C is delivered in the pulse of B point ₁₅₇Count, counting finishes door ₁Output 0, this signal one tunnel is through door ₁₃Make relay J ₁Adhesive, the one tunnel through door ₂₁, C ₄, R ₁₄, trigger Q ₆Trigger, Q ₆Output 1 makes J ₆Adhesive, Q ₆Output 1 makes by R again ₈, R ₉, R ₁₀, C ₁, D ₈, the door ₂₀, the door ₁₉The controlled oscillator starting of oscillation of forming is through R ₇, BG ₇, make J ₇Do continuous 1 second disconnected 2 seconds moving doing.J _7-1Intermittently connect by BG ₉, BG ₁₀, R ₃₄, R ₃₅, B ₂The 25Hz ringing current generator power supply of forming, ringing current is by 25Hz transformer B ₂L ₁Output is through C ₂₀, J _6-1, J _1-1, extension set (DH ₁), J _1-2, J _6-2Form the loop, to a minute power ringing.J _7-2Intermittently connect by R ₃₆, R ₃₇, R ₃₈, C ₃₅, C ₃₆, BG ₈, B ₃The 500Hz oscillator supply of forming, oscillator signal is through 500Hz transformer B ₃Output, collection of letters transformer B ₁Coupling is through a line, J _5-1, C ₁₉, L ₁, J _5-2, the b line forms the loop, the user send ring-back tone to outside line.Behind the extension set off-hook, V _DDThrough 25Hz transformer B ₂L ₁, J _6-2, J _1-2, extension telephone (DH ₁), J _1-1, J _6-1, E, R ₁₉, R ₂₀Form the loop, off hook signal appears in the E point, through door ₂₅, the door ₂₂, C ₅, R ₁₃Differential makes Q ₅, Q ₆Trigger puts 1, Q ₅, Q ₆Output 0, J ₅, J ₆Dead electricity discharges, J ₇Also discharge, a line is through J thereupon _5-1, J _6-1, J _1-1, extension telephone (DH ₁), J _1-2, J _6-2, J _5-2, the b line forms the loop, converse.Words finish the extension set on-hook, by R ₂₉, D _10-13, R ₃₀, R ₃₁, C ₁₅, W ₁The level sensitive circuit of forming detects, and high potential 1 occurs at the D point, through door ₂₆, the door ₂₇, R ₂₁, R ₂₂, C ₉To C ₁₀, R ₂₃The differential circuit of forming produces quenching pulse, complete machine zero clearing, J ₁Dead electricity discharges, circuit restoration.

When called off-hook not for a long time, after The Calling Party Hooks On, by collection of letters transformer B ₁The busy-back signal that reception is sent here by switch amplifies through the 1/4LM324 frequency-selecting, door ₃₆, the door ₃₇, the door ₃₈Integer high potential 1 occurs at the C point, through door ₂₅, the door ₂₂, trigger Q ₅, Q ₆Trigger makes J ₅, J ₆, J ₇Dead electricity discharges, and the D point produces quenching pulse, complete machine zero clearing, J ₁Dead electricity discharges, the multiple road of circuit.

When doing caller, extension subscriber off-hook (is example with No. 1 extension set), V _DDThrough J _1-2, extension telephone, J _1-1, H ₁, R ₂₄Form the loop, at H ₁High potential 1 appears in point, through door ₅, the door ₉, trigger Q ₁Trigger makes Q ₁Output 0 is through door ₁₃, R ₁, BG ₁Make J ₁Adhesive, a line is through J _5-1, J _6-1, J _1-1, extension telephone (DH ₁), J _1-2, J _6-2, J _5-2, the b line forms the loop, dial and converse.Words finish the extension set on-hook, through R ₂₉, D _10-13, R ₃₀, R ₃₁The level sensitive circuit of forming detects, and high potential 1 appears in the D point, through door ₂₆, the door ₂₇Produce quenching pulse and make complete machine zero clearing, J ₁Dead electricity discharges, circuit restoration.

Owing to adopt such scheme, the utility model by being loaded between local exchange and the subscriber phone, be equivalent to a small-sized city automatic dial user branch office that four users of an outside line are arranged, branch office's number promptly is this trunk number, and the extension telephone number that inserts user branch office is to add a tail number after the relaying wire size.Each extension subscriber busy trunk respectively carries out routine dialing and conversation.All circuit adopts discrete component and the assembling of cmos digital integrated circuit, and is simple in structure.

The description of the drawings.

Fig. 1, Fig. 2 are circuit theory diagrams of the present utility model.

Same letter links to each other with lead in the drawings, links to each other as A, A, and B, B link to each other

The lead representation ┼ ┬ that links to each other

The continuous representation ┼ of lead

Ground connection representation ┴

Meet positive source representation-V _DD

Integrated circuit representation in the drawings

1, not gate

2, NAND gate

3, NOR gate

4, rest-set flip-flop

5, operational amplifier

6, counter

Several in the drawings element representations

1, rectification circuit

2, transformer B

3, triode BG

4, diode D

5, voltage-stabiliser tube D

6, resistance R

7, capacitor C

8, relay J

9, relay tip

10, telephone set DH

Claims (3)

1, a kind of substation type raise-position increase-volume automatic telephone machine that continues is finished the automatic telephone switching purpose by the electronic circuit control actuating of relay, it is characterized in that: relay J ₅Two pairs of changeover contacts resistance R ₃₃With collection of letters transformer B ₁Coil L ₁Jump to a, b line after the series connection, extension telephone is respectively through relay J ₁, J ₂, J ₃, J ₄Changeover contact jumps on a, the b line, relay J ₆Changeover contact is 25H _ZTransformer B ₂Coil L ₁With capacitor C ₂₀Jump to after the series connection on a, the b line.

2, the substation type according to claim 1 raise-position increase-volume automatic telephone machine that continues is characterized in that: do called static when receiving bell a line through C ₁₆, R _32X, D _14-17, C ₁₇, the b line forms ac circuit; When receiving outside line subscriber dialing pulse, a line is through J _5-1, R ₃₃, collection of letters transformer B ₁L ₁, J _5-2, the b line forms DC loop; When minute power ringing, ringing current is by 25Hz transformer B ₂L ₁Output is through C ₂₀, J _6-1, J _1-1, extension set, J _1-2, J _6-2Form the loop, ringing tone signal is by 500Hz transformer B simultaneously ₃Output, collection of letters transformer B ₁Coupling is through a line, J _5-1, C ₁₉, L ₁, J _5-2, the b line forms the loop; During the extension set off-hook, V _DDThrough 25Hz transformer B ₂L ₁, J _6-2, J _1-2, extension telephone, J _1-1, J _6-1, E, R ₁₉, R ₂₀Form DC loop; During conversation, a line is through J _5-1, J _6-1, J _1-1, extension telephone, J _1-2, J _6-2, J _5-2, the b line forms the loop.

3, the substation type according to claim 1 raise-position increase-volume automatic telephone machine that continues is characterized in that: when making caller extension set off-hook, and V _DDThrough J _1-2, extension telephone, J _1-1, H ₁, R ₂₄Form DC loop; When dialing and conversation, a line is through J _5-1, J _6-1, J _1-1, extension telephone, J _1-2, J _6-2, J _5-2, the b line forms the loop.

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